. >>> a new challenge to the pentagon's ban on women serving in combat. four female service members have filed a lawsuit for the right to fight saying the policy as it stands now blocks them from advancements that are open to men who serve in combat. >>> and an apology from the youngest star of "two and a half men." while he did not take back his comments calling his show filth, angus t. jones said he apologized if his remarks were disrespectful of his colleagues and expressed gratitude for the opportunity to be on the show. we'll have more on the story coming up in a live report. >>> and "gangnam style" is the dance craze that has taken the world by storm. just about everyone is doing the horsey dance, except for our matt lauer. he conveniently wasn't here that are psy's concert on our plaza so jibjab has found a way to make matt dance. >> that's not funny. ♪ ♪ ♪ oppa gangnam style >> something's so wrong about that but so right. go to jibjab.com and put any face you want in there. it's free. so matt, savannah. >> that's really nice. >> you brought